634863461 has 2 divisors, whose sum is σ = 634863462. Its totient is φ = 634863460.

The previous prime is 634863409. The next prime is 634863479. The reversal of 634863461 is 164368436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 546390625 + 88472836 = 23375^2 + 9406^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634863461 is a prime.

It is a super-2 number, since 2×634863461² = 806103228225797042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634863161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317431730 + 317431731.

It is an arithmetic number, because the mean of its divisors is an integer number (317431731).

Almost surely, 2^634863461 is an apocalyptic number.

It is an amenable number.

634863461 is a deficient number, since it is larger than the sum of its proper divisors (1).

634863461 is an equidigital number, since it uses as much as digits as its factorization.

634863461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 41.

The square root of 634863461 is about 25196.4969985909. The cubic root of 634863461 is about 859.4621934952.

The spelling of 634863461 in words is "six hundred thirty-four million, eight hundred sixty-three thousand, four hundred sixty-one".